Originally posted by oldtreeguy Hi all from Ontario Canada
---------- Post added 08-13-20 at 10:47 AM ----------
I have a Sigma 600mm f8 mirror lens and the filter holder unit is broken. Would anyone know where I could find one? Thank you for your time
Welcome to Pentax Forums.
Does the filter holder look like this?
If so, Sigma no longer supports this lens. I bought one new in the early 1980's, and several years ago I discovered the holder had a crack in it. It eventually broke. I contacted Sigma and they pretty much blew me off, with "that lens is ancient" and "we no longer support such old equipment".
I found one on eBay in Olympus mount cheap, and bought it just for the filter holder.